MARINE GRADE WATERPROOF SEAL – Don't let moisture ruin your connections. Unlike standard tubes, our dual-wall tubing features a heat-activated adhesive lining that oozes out to create a 100% watertight seal. Perfect for boat trailer lights, bilge pumps, and outdoor automotive wiring where corrosion resistance is critical. SUPERIOR 3:1 SHRINK RATIO – Shrinks down to 1/3 of its original size to fit tightly over irregular shapes and connectors. Whether you are fixing a frayed iPhone charger cable or splicing thin wires, this high-ratio tubing grips tighter than standard 2:1 tubes, preventing sliding or wire pull-out. [User Intent: Convenience] PRE-CUT FOR QUICK REPAIRS – Save time on the job site. We've pre-cut these tubes to the most convenient length (1.85 inches), ideal for quick wire splicing and terminal insulation. No need to fumble with scissors while holding a soldering iron. Includes a neatly organized box with sizes from 1/8" to 1". [Safety & Compliance] INDUSTRIAL & AUTOMOTIVE STANDARD – Engineered for harsh environments. Our tubing is UL Certified and rated for up to 600V and 257°F (125°C). It provides excellent protection against abrasion, fuel, and chemicals, making it safe for engine bay wiring and heavy-duty industrial machinery. [Versatility] ESSENTIAL FOR DIY & PROS – A must-have kit for electricians, mechanics, and hobbyists. Ideal for RC drones, stereo installation, underground dog fences, and LED light strips. The black and red colors help you easily code polarity for battery and power connections. wisuwore 242pcs 3:1 Dual Wall Adhesive lined Heat Shrink Tubing Kit, Black and Red
Specification
Color: Black and Red
Material: Polyolefin
Heat shrink ratio: 3:1
Operating Temperature:-45°C to + 125°C
Shrinkage Temp: 212℉(Fahrenheit)
Tensile strength: ≥10.4Mpa
Dielectric strength: 15 kV / mm
Flammability: Flame Retardant
How to use it?
1. First choose the right size tubes, as it is 3:1 heat shrink ratio, and will shrink up to 1/3 of original diameter.
2. Wrap the cable wire with the tube, then use a heat gun heating it until the wire was wrapped tightly.
3. Don't touch the tube until it becomes cool.
The main function is to seal waterproof, anti-corrosion, anti-air leakage, applied to electronic equipment wire connection, automotive wiring harness, home appliance wiring harness, wire and cable branches, metal piping, wire and cable repair, submersible pump wiring and other sealed occasions. Why settle for weak connections that corrode over time? Wisuwore brings you professional-grade insulation that stands the test of time. Designed for the Real World Whether you are restoring a vintage car, fixing the wiring on your fishing boat, or building a custom FPV drone, connection failure is not an option. Our 3:1 Dual Wall Heat Shrink Tubing is designed to withstand the toughest elements—saltwater, oil, heat, and vibration. How the 'Dual Wall' Technology Works: Outer Wall: Provides abrasion resistance and electrical insulation. Inner Adhesive: Melts when heated, filling gaps and bonding to the wire insulation. This prevents water from wicking up the wire (a common cause of failure in marine electronics).
Specification
Color: Black and Red
Material: Polyolefin
Heat shrink ratio: 3:1
Operating Temperature:-45°C to + 125°C
Shrinkage Temp: 212℉(Fahrenheit)
Tensile strength: ≥10.4Mpa
Dielectric strength: 15 kV / mm
Flammability: Flame Retardant
How to use it?
1. First choose the right size tubes, as it is 3:1 heat shrink ratio, and will shrink up to 1/3 of original diameter.
2. Wrap the cable wire with the tube, then use a heat gun heating it until the wire was wrapped tightly.
3. Don't touch the tube until it becomes cool.
The main function is to seal waterproof, anti-corrosion, anti-air leakage, applied to electronic equipment wire connection, automotive wiring harness, home appliance wiring harness, wire and cable branches, metal piping, wire and cable repair, submersible pump wiring and other sealed occasions. Why settle for weak connections that corrode over time? Wisuwore brings you professional-grade insulation that stands the test of time. Designed for the Real World Whether you are restoring a vintage car, fixing the wiring on your fishing boat, or building a custom FPV drone, connection failure is not an option. Our 3:1 Dual Wall Heat Shrink Tubing is designed to withstand the toughest elements—saltwater, oil, heat, and vibration. How the 'Dual Wall' Technology Works: Outer Wall: Provides abrasion resistance and electrical insulation. Inner Adhesive: Melts when heated, filling gaps and bonding to the wire insulation. This prevents water from wicking up the wire (a common cause of failure in marine electronics).